BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	sum(l_extendedprice) / 7.0 as avg_yearly
from
	lineitem,
	part
where
	p_partkey = l_partkey
	and p_brand = 'Brand#51'
	and p_container = 'WRAP JAR'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=350221.40..350221.41 rows=1 width=4) (actual time=861.312..861.312 rows=1 loops=1)
   Buffers: shared hit=51665 read=30137 dirtied=37 written=1170
   ->  Nested Loop  (cost=130.19..350172.01 rows=19758 width=4) (actual time=0.753..860.343 rows=5262 loops=1)
         Buffers: shared hit=51665 read=30137 dirtied=37 written=1170
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7785.40 rows=1971 width=4) (actual time=0.160..36.924 rows=1951 loops=1)
               Index Cond: ((p_container = 'WRAP JAR'::bpchar) AND (p_brand = 'Brand#51'::bpchar))
               Heap Fetches: 1951
               Buffers: shared hit=40 read=1871 written=76
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.006..0.007 rows=3 loops=1951)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13105
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.411..0.411 rows=1 loops=1951)
                       Buffers: shared hit=38520 read=28266 dirtied=37 written=1094
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem lineitem_1  (cost=0.56..129.11 rows=31 width=4) (actual time=0.041..0.403 rows=30 loops=1951)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58676
                             Buffers: shared hit=38520 read=28266 dirtied=37 written=1094
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.411..0.411 rows=1 loops=1951)
                       Buffers: shared hit=38520 read=28266 dirtied=37 written=1094
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem lineitem_1  (cost=0.56..129.11 rows=31 width=4) (actual time=0.041..0.403 rows=30 loops=1951)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58676
                             Buffers: shared hit=38520 read=28266 dirtied=37 written=1094
 Planning time: 3.348 ms
 Execution time: 861.491 ms
(27 rows)

COMMIT;
COMMIT